AutoCodes – Generic – P127A

P127A Code - Aborted Engine Start

Quick Answer

The Engine Control Module (ECM) monitors the fuel pressure. Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: P127A indicates Aborted Engine Start.
Common causes: Common causes include Faulty Fuel Pump, Fuel Pump harness is open or shorted, Fuel Pump circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 5,551

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 06, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P127A Description

The Engine Control Module (ECM) monitors the fuel pressure. The ECM sets the OBDII code when the fuel pressure is not to factory specifications.

OBDII Code P127A - Aborted Engine Start - AutoCodes.com — P127A Code - Aborted Engine Start

What does this mean?

What are the Possible Causes of the DTC P127A?

Faulty Fuel Pump
Fuel Pump harness is open or shorted
Fuel Pump circuit poor electrical connection

How to Fix the DTC P127A?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P127A code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P127A code?

Need more information on how to fix the P127A code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P127A code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

P127A BMW — Nitrogen Oxide Sensor Overrun Test NOx Signal Too High
P127A Chrysler — Starter Control Circuit 2 Overcurrent
P127A Dodge — Starter Control Circuit 2 Overcurrent
P127A Ford — Aborted Engine Start
P127A MINI — Nitrogen Oxide Sensor Overrun Test NOx Signal Too High

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P127A Code

1. What are the common symptoms of OBDII code P127A (Aborted Engine Start)?

- Common symptoms include difficulty starting the engine, rough idling, and reduced engine performance.

2. What are the possible causes of OBDII code P127A?

- Possible causes of the P127A code include a faulty engine control module (ECM), issues with the fuel system, or a malfunctioning crankshaft position sensor.

3. How can I diagnose the cause of OBDII code P127A?

- Diagnosing the P127A code typically involves using a scan tool to check for any related trouble codes, inspecting the fuel system components, and testing the ECM and sensors for proper functionality.

4. What repairs are typically needed to fix OBDII code P127A?

- Repairs for the P127A code may include replacing a faulty ECM, repairing or replacing components in the fuel system, or fixing issues with the crankshaft position sensor.

5. Can a DIY enthusiast fix OBDII code P127A at home?

- While some DIY enthusiasts may have the skills to diagnose and repair the P127A code, it is recommended to consult a professional mechanic for accurate diagnosis and proper repair.

6. Is it safe to continue driving with OBDII code P127A present?

- It is not recommended to continue driving with the P127A code present, as it can lead to further damage to the engine and may result in decreased performance and fuel efficiency.

7. How much does it typically cost to repair OBDII code P127A?

- The cost of repairing the P127A code can vary depending on the underlying cause and the labor rates of the mechanic. It is advisable to obtain quotes from different repair shops for comparison.

8. Can a faulty crankshaft position sensor trigger OBDII code P127A?

- Yes, a faulty crankshaft position sensor can cause the ECM to abort the engine start process, triggering the P127A trouble code.

9. Will resetting the ECM clear OBDII code P127A?

- Resetting the ECM may temporarily clear the P127A code, but if the underlying issue is not fixed, the code is likely to reappear once the engine is started again.

10. How urgent is it to address OBDII code P127A?

- It is important to address the P127A code promptly to prevent potential engine damage and ensure the vehicle operates safely and efficiently.